Yep - same issue I am seeing. It seems to occasionally work the first time after I reboot the phone, but only ~25%? I havent had time to take a good look at it, but hopefully I will this weekend.
I know that after either the April android security patch, or the June 1 play system update, I had another app request additional file permissions before it would read the SD card. In looking at the android release notes, Android is implementing a "scoped storage strategy". Im not an expert, but here is what I found after some googling:
Legacy access allows apps to have broad access to the device’s storage without being subjected to Scoped Storage restrictions. However, all apps that target Android 11 (API level 30) and above are subject to Scoped Storage restrictions and cannot request legacy access to device storage. Instead, they must request a new permission called MANAGE_EXTERNAL_STORAGE (shown to the user as “All Files Access”) to be given broad storage access (excluding a handful of directories like /Android/data or /Android/obb).
Of course, this could still be a red herring, but since other folks are having the same issue, I will be less suspicious of my SD card now, especially since it is working for the other media apps that use it.
==>Chad