I also have an ACA 1232 and it runs very smooth, no issues so far. My Amiga 1200 has a 1D4 board, the capacitors E123 and E125 are missing.
My only problem is none of my network cards work together with the ACA 1232. The Amiga freezes as soon as I click ONLINE in Miami oder AMI/TCP.
Disabling the ACA solves the network problems.
Any ideas ?