How long does it take to lose all the air? Did you confirm the bags you replaced were leaking? If so, first troubleshooting to check your work. Assume there are no coincidences.
Not unheard of that new bags leak.

If you didn't verify the source of the leak, it could have been a problem with the compressor or if the the bags were leaking for a long time the compressor could have been damaged and is a second leaking source.

As mentioned, soapy water is a good way to troubleshoot. Since not all soapy water is created equal, I usually loosen a line so there is a very small leak and see if the soapy water is going to make bubbles. And I test each connection several times as it doesn't always make bubbles. I wonder if the solution used to blow bubbles would be effective without a test. The risk in loosening a line is that it leaks when tightened back up or worse, after some time as passed so you have to go back in and start over finding the leak.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas