Any known issues with Mega Everdrive, 32x and switchless mod consoles?

Hi, I'm investigating a problem for a customer/client. He had his Megadrive, MegaCD and 32x switchless modded by another company, now he's asking us to do a non-switched mod as he is convinced that the switchless mod causes glitches with his Mega Everdrive and 32x games. Specifically, he says that when he resets his console while playing a 32x game from the Mega Everdrive, the unit goes to a black screen instead of the Mega Everdrive menu, preventing him from saving his progress.

This seems strange to me and I wanted to know if anyone else had ever seen any behaviour like this? The 32x works fine when paired with another console without the switchless mod.

 

i never had a probleam with my ever drive 2.1 on my swithcless consoles.

 

We're talking specifically the Mega Everdrive and the 32x here though.

 

I usually test 32x with mega everdrive and switchless modded md's as I don't own original 32x games, never had a problem.