Can bubbles escaping into beer line cause high pressure decrease?

[jplickel]

Will bubbles escaping into beer line when the keg is coupled cause a high pressure decrease if the main CO2 valve is shut off??

Could this be making it seem as a CO2 leak when it really is not a leak at all?

[timg]

The bubbles in the beer line are most likely under-carbonation. I don't think that would cause the high pressure side to drop. If anything I think your low side would drop from absorbing the co2. The high side means leak.