Because the lunar landings happened at some latitude, the landing sites were subject to longitudinal drift due to the Moon's rotation around its own axis.
Due to the small latitude of the first landing, less than 1 degree for Apollo 11, and the short stay on the Moon, The LM lunar landing site did not drift far from the CSM orbital plane. Hence, Apollo 11 did not have a CSM plane change maneuver
However all subsequent landings did this.
From the Apollo 17 mission timeline, five and a half hour before LM ascent in this case:
CSM plane change ignition (RCS). 179:53:53.83
CSM plane change cutoff. 179:54:13.88
(Other Apollo missions used the SPS rather than the RCS)
In conclusion, the planes were drifting apart, and a correction maneuver was needed before LM ascent to correct this on all Apollo missions except Apollo 11.
 Lunar landing coordinates: https://nssdc.gsfc.nasa.gov/planetary/lunar/apolloland.html