epson2 : perfection 1200U failure with TPU

Hello,

trying to scan with TPU I got an "[21:36:33.307049] [epson2] e2_ext_read: cancel request received" error.

If I force epson driver everything work. Without TPU connected and epson2, the scanner also work.

I am using debian with 1.0.31-4.1 version

attached the full loglogs

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