OFFICIAL Receiving-sending-exchanging Gifts

[Palmarina]

Hi, in the last week I noticed several times a problem while accepting gifts.
This evening, again, gifts "disappeared" somewhere between accepting them and going to the "My Gifts" tab to store them. This time it happened with Glads. On the "Pending Gifts" tab there were 74 pending gifts. I exchanged them all for Glads (5x) and accepted. I went to the "My Gifts" tab and there were 360 Glads. As far as I know the original 74 gifts x 5 should give me 370 Glads. So I lost 10 items somewhere on the road.
This is not the first time I noticed this. It happened before with trees too.
Did other people noticed this too?
What should I do about it? Call helpdesk?
Thanks in advance for your help or advice.