Analog to Digital + Rewind is bugged on some cores

Description

When using the option Analog to Digital, some cores present glitchy behavior if combined with rewind.

Expected behavior

If enabled, it should convert digital input to analog.

Actual behavior

It's still possible to use analog input, but the command is interrupted several times. It looks like the rewind interrupts the analog everytime it saves. It does not happen when using digital input.

Cores that it happens: bsnes, bsnes hd, flycast when loading naomi/atomiswave. There could be more, I haven't tested all cores.

Steps to reproduce the bug

1. Load a game;
2. On quick menu, go to controls > port 1 controls > enable analog to digital - lef analog
3. Rewind must be on
4. Try to walk on any game using the analog stick.

Bisect Results

It did not happen before, don't know when. At first it was on flycast arcade games after the name change, and with bsnes, about a month ago.

• RetroArch: [1.9.0]

Environment information

• OS: Windows 10

Start by reproducing the issue from Quick Menu > Controls > Port 1 Controls with Analog to Digital enabled and rewind on, using bsnes, bsnes HD, and Flycast Naomi/Atomiswave games on RetroArch 1.9.0. Trace the interaction between analog-to-digital input and rewind while saving states; done means analog movement is no longer interrupted when rewind is enabled on the affected cores.