When I connect the otg cable to my phone (Redmi 11pro) a window with otg options pops up and closes fast and unstoppable. It doesn't give time to select an option. Everything is new and not defective. Then after a few seconds it connects to the app and works no problems. But I can't figure out why it does that at first connection. Other thing I noticed is that it charges my phone on connection.
How can I fix that?

Hi, djiuser_WD1KrvUWSkCj. Thank you for reaching out. Regretfully, we won't be able to locate the issue with the information provided above. In case the issue happens again, please provide us with a screen recording/video for us to check. In regards to the charging options, by default, charging is enabled and cannot be disabled for Android devices. Thank you for your kind understanding and support.

As ironic as it is going to sound being DJI is a Chinese company as well, stay away from Chinese branded phones / tablets for using DJI Fly. Most of the times if not all, Chinese brands do not bake proper USB protocols  in their devices that DJI Fly or OTG usages require.

Start a screen capture app before you connect the phone to the controller so that you can review the message at a later time.
In what way does the phone go crazy? It sounds like it posts a message and then opens the app which, to me, does not sound crazy.
Are you switching the controller on before you connect the phone? Personally I prefer to  connect and disconnect the phone with the controller switched off.

Thank you for your replies! I'll try to do a screen capture these days, also I try to have the controller switched of before connecting to phone and come back and report.

djiuser_WD1KrvUWSkCj Posted at 5-19 01:35
Thank you for your replies! I'll try to do a screen capture these days, also I try to have the controller switched of before connecting to phone and come back and report.

We'll look forward to your update. Thank you.

Il forum non mi permette di caricare un video ma anche il mio Xiaomi redme note 11 pro plus "impazzisce" quando collego il cavo USB al controller. Accendo il controller dopo averlo collegato ma non cambia nulla. Il telefono fa infiniti tentativi e infinite richieste per capire se deve solo caricare la batteria o trasferire e non riesce effettivamente a collegarsi col drone. In questo modo il drone è inutilizzabile. Molto fastidioso.

djiuser_iJRJ2XJUsnsk Posted at 5-30 02:25
Il forum non mi permette di caricare un video ma anche il mio Xiaomi redme note 11 pro plus "impazzisce" quando collego il cavo USB al controller. Accendo il controller dopo averlo collegato ma non cambia nulla. Il telefono fa infiniti tentativi e infinite richieste per capire se deve solo caricare la batteria o trasferire e non riesce effettivamente a collegarsi col drone. In questo modo il drone è inutilizzabile. Molto fastidioso.

Hi there. We're sorry for the trouble caused. Please upload the video on this link so we may check it further for you. Thank you.

or post the video on youtube etc. and post a link here.