Sequencer thumbnails are over exposure

Hello every one,
i have a problem on the cinematic sequencer timeline. all sequences thumbnails are over exposure .
Someone have a issu to fix my problem ?
Thanks

ps: sorry for my english

Ever a solution to this?

Hello, I have not found a solution except that the problem only appears in architecture mode.
The problem does not appear in the other modes.
cordially

I’m experiencing the same problem