Default USB OTG issue

So I made my own USB OTG, and it works perfectly, but for the first time only. plugging it the second time gets me no response, no mount dialog appearing or anything else that could tell me whether the sdcard i plugged in mounted or not. however, after a reboot, it works perfectly, but just for the first time.

i hope somebody can help because my storage is nearly brimming and i want to transfer stuff to my sd card, which is btw a SanDisk class 10, 32 GB
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