Trips report running too slow

Don't have any specific recommendations. If you have a lot of trip records, it's probably expected that it's going to be a bit slow.

Victor Butler Are you using your own nominatim server?, because maybe that would be a solution.

I'll look for a fast service and do some tests, I guess.
Still, thanks Anton for helping to find the root cause of the problem!

@Cristian, thanks for the suggestion. I've considered this but the number of records that need to be decoded don't justify running a self hosted environment. Some of the $20 per month alternatives should be enough I hope.

Another question, I've explicitly set those two to true. Why are the coordinates in the Trips report still decoded?

<entry key='geocoder.onRequest'>true</entry>
<entry key='geocoder.ignorePositions'>true</entry>

According to the documentation the true setting is the default one:
By default reverse geocoding is only done when user requests reports or explicitly clicks "show address" button in the app. You can disable this behavior using the following parameters.

So it seems that:

<entry key='geocoder.onRequest'>true</entry> - When you wish to decode coordinates in reports and notifications
<entry key='geocoder.ignorePositions'>false</entry> - When you wish to decode position coordinates