diff --git a/packages/general/src/transaction/Tx.ts b/packages/general/src/transaction/Tx.ts
index 6b7049fd90..c71e28a268 100644
--- a/packages/general/src/transaction/Tx.ts
+++ b/packages/general/src/transaction/Tx.ts
@@ -688,6 +688,7 @@ class Tx implements Transaction, Transaction.Finalization {
                     const promise = participant.postCommit?.();
 
                     if (MaybePromise.is(promise)) {
+                        i++;
                         return Promise.resolve(promise).then(executePostCommit, e => {
                             reportParticipantError(e);
                             executePostCommit();
diff --git a/packages/general/test/util/ObservableTest.ts b/packages/general/test/util/ObservableTest.ts
index 3b89d69955..0480e66535 100644
--- a/packages/general/test/util/ObservableTest.ts
+++ b/packages/general/test/util/ObservableTest.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { Observable, ObserverGroup } from "#util/Observable.js";
+import { AsyncObservable, Observable, ObserverGroup } from "#util/Observable.js";
 
 // Observable deserves proper unit tests but is tested heavily via other modules.  Currently this file just tests a
 // few spot cases
@@ -52,3 +52,39 @@ describe("ObservableGroup", () => {
         expect(observable.isObserved).false;
     });
 });
+
+describe("AsyncObservable", () => {
+    it("emits", async () => {
+        const observable = AsyncObservable<[foo: string]>();
+
+        let observedFoo;
+
+        observable.on(async foo => {
+            observedFoo = foo;
+        });
+
+        await observable.emit("what I expect");
+
+        expect(observedFoo).equals("what I expect");
+    });
+
+    it("emits with mix of observers", async () => {
+        const observable = AsyncObservable<[foo: string]>();
+
+        const observedFoos = Array<string>();
+
+        for (let i = 0; i < 3; i++) {
+            observable.on(async foo => {
+                observedFoos.push(foo);
+            });
+
+            observable.on(foo => {
+                observedFoos.push(foo);
+            });
+        }
+
+        await observable.emit("asdf");
+
+        expect(observedFoos).deep.equals(["asdf", "asdf", "asdf", "asdf", "asdf", "asdf"]);
+    });
+});
diff --git a/packages/node/test/behaviors/on-off/OnOffServerTest.ts b/packages/node/test/behaviors/on-off/OnOffServerTest.ts
index 5f8ea141ac..38780126a1 100644
--- a/packages/node/test/behaviors/on-off/OnOffServerTest.ts
+++ b/packages/node/test/behaviors/on-off/OnOffServerTest.ts
@@ -6,6 +6,7 @@
 
 import { OnOffServer } from "#behaviors/on-off";
 import { MaybePromise } from "#general";
+import { MockServerNode } from "../../node/mock-server-node.js";
 
 describe("OnOffServer", () => {
     it("accepts extensions of off-only commands", () => {
@@ -18,4 +19,28 @@ describe("OnOffServer", () => {
 
         x satisfies { on(): MaybePromise };
     });
+
+    it("properly supports async observers", async () => {
+        const server = await MockServerNode.createOnline();
+        const part = server.parts.get(1);
+
+        const observedValues = Array<boolean>();
+
+        part!.eventsOf(OnOffServer).onOff$Changed.on(async value => {
+            observedValues.push(value);
+        });
+
+        for (let i = 0; i < 2; i++) {
+            await part!.act(async agent => {
+                const onOff = agent.get(OnOffServer);
+                await onOff.toggle();
+            });
+        }
+
+        await server.close();
+
+        await MockTime.yield3();
+
+        expect(observedValues).deep.equals([true, false]);
+    });
 });
diff --git a/packages/types/src/tlv/TlvString.ts b/packages/types/src/tlv/TlvString.ts
index a595786254..476f33571a 100644
--- a/packages/types/src/tlv/TlvString.ts
+++ b/packages/types/src/tlv/TlvString.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { InternalError, maxValue, minValue, serialize, UnexpectedDataError } from "#general";
+import { InternalError, serialize, UnexpectedDataError } from "#general";
 import { ValidationDatatypeMismatchError, ValidationOutOfBoundsError } from "../common/ValidationError.js";
 import { TlvCodec, TlvTag, TlvToPrimitive, TlvType, TlvTypeLength } from "./TlvCodec.js";
 import { TlvReader, TlvSchema, TlvWriter } from "./TlvSchema.js";
@@ -29,6 +29,8 @@ export class StringSchema<T extends TlvType.ByteString | TlvType.Utf8String> ext
         super();
 
         if (minLength < 0) throw new InternalError("Minimum length should be a positive number.");
+        if (maxLength < 0) throw new InternalError("Maximum length should be a positive number.");
+        if (minLength > maxLength) throw new InternalError("Minimum length should be smaller than maximum length.");
     }
 
     override encodeTlvInternal(writer: TlvWriter, value: TlvToPrimitive[T], tag?: TlvTag): void {
@@ -60,8 +62,8 @@ export class StringSchema<T extends TlvType.ByteString | TlvType.Utf8String> ext
     bound({ minLength, maxLength, length }: LengthConstraints) {
         return new StringSchema(
             this.type,
-            length ?? maxValue(this.minLength, minLength),
-            length ?? minValue(this.maxLength, maxLength),
+            length ?? minLength ?? this.minLength,
+            length ?? maxLength ?? this.maxLength,
         );
     }
 }