Any editors out there having issues with the Samsung T7 Portable SSD on macOS 26.3 / 26.4?

Any editors out there having issues with the Samsung T7 Portable SSD on macOS 26.3 / 26.4?

I’ve got two T7s formatted as APFS, and ever since updating to 26.3, I can’t reliably transfer files to them. Reading is totally fine at full speed, but writing starts, immediately drops to 2–3 MB/s, then eventually fails with Error -51.

Curious if anyone else is seeing this or has found a fix.