failure to translate while tracing ptsig with trace_after_instrs

**Describe the bug**
```
$ build/bin64/drrun -t drcachesim -trace_after_instrs 2000M --offline -- build/suite/tests/bin/pthreads.ptsig

<(1+x) Handling our fault in a TRY at 0x00007fdd93329228>

```

See https://groups.google.com/g/DynamoRIO-Users/c/uldfnkSW-sc

**To Reproduce**
See cmd line above

**Expected behavior**
No assert failure.

**Screenshots or Pasted Text**

**Versions**
- What version of DynamoRIO are you using?
- b114a32e65ece7a6cbf8d9eee9ae779b3c78e567
- Does the latest build from https://github.com/DynamoRIO/dynamorio/releases solve the problem?
- No
- What operating system version are you running on? ("Windows 10" is *not* sufficient: give the release number.)
- Ubuntu 18.04.6 LTS
- Is your application 32-bit or 64-bit?
- 64-bit

**Additional context**
Add any other context about the problem here.