Practice buoyancy, control, trim and situational awareness, until you reach an acceptable level. Then expect a degradation in that performance whenever you add subsequent task loading. Cameras are a lot of task loading.
This skill degradation occurs because you are no longer capable of devoting your full attention to the primary, underlying skill. Any deficiencies in that skill (not fully ingrained, automatic and unconscious) will be exposed when you aren't actively resolving them as a priority.
It's okay to anticipate a degree of skill deficiency when pushing your comfort zones and task loading on dives. That said, and with that anticipation in mind, do compensate for the deficiency by decreasing the overall complexity, risk and demand of the dives that you undertake.
succinctly Master Yoda speaks, hmmmm? ;-)