Perhaps tastywork changed how multi threads are handled in a recent update. For example, some platforms will run all Charts and data of an instrument on a single CPU thread to prevent data from desyncing. So even if you have excess CPU capacity available, the software will bottleneck on a single thread and lockup.
It's possible it is not affecting everybody because a CPU with a high single thread rating will be able to handle much more before lockup.
For reference, Intel i3-7100u has a single thread rating of 1390:
https://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i3-7100U+@+2.40GHz&id=2879
We only use Ryzen 5900x and higher with single thread rating of 3495:
https://www.cpubenchmark.net/cpu.php?cpu=AMD+Ryzen+9+5900X&id=3870