Split HDMI out from ATEM Mini Pro

I'm trying to split the output from my ATEM Mini Pro to two displays simultaneously, but standard HDMI splitters aren't working as expected. Interestingly, the splitter works fine when connected directly to the PC.
Do you recommend a specific splitter brand, or is this setup even possible?

We've had excellent results using both Ocean Matrix and Decimator products.

I'm trying to split the output from my ATEM Mini Pro to two displays simultaneously, but standard HDMI splitters aren't working as expected. Interestingly, the splitter works fine when connected directly to the PC.
Do you recommend a specific splitter brand, or is this setup even possible?

Have you found any solution to this? Is this an HDCP issue (like does the PC output HDCP, but the AMP does not or vice versa)?

It's driving me nuts.