Definitely not, as pressing the space bar would cause the message "Holding on TG XX" and pressing it again would result in "Hold released" but what I noticed is that it on initial press, the call would drop due to a frequency change. It is only if a second transmission occurs that the hold starts to work, in other words it only retune to the correct frequency if another call is made.
That is not all, I also noticed that the hold is not directed at the talk group in general, but a source and destination pair. Say the hold was done with between Radio A and Talk Group X. If another transmission comes in this time with Radio B and Talk Group X, the hold would not tune to that frequency. It would only accept the same pair; Radio A and Talk Group X.
I am not if this is by design or a bug and whether this has been solved in the latest paid version? I would like to lock on to a particular talk group and have it tune regardless of which radio is transmitting to that talk group.