TOPIC:

The bug comes from the "Compass" property.
When its value changes, the component disappears.

The line in question is this:
" If (TempValue <> Value) Or (csDesigning In ComponentState) Or UpdateReq Then
      Refresh; "
L 816 ; unit ExAvionicHSIMy configuration :
        Operating System
            Windows 10 Professionnel 64-bit
        CPU
            Intel Core i7 4790K @ 4.00GHz    40 °C
            Haswell 22nm Technology
        RAM
            16,0GB Single-Channel DDR3 @ 932MHz (10-11-10-30)
        Motherboard
            ASUSTeK COMPUTER INC. Z97-PRO GAMER (SOCKET 1150)    24 °C
        Graphics
            S24B300 (1920x1080@60Hz)
            PBM_V240W (1920x1200@59Hz)
            4095MB NVIDIA GeForce GTX 970 (ASUStek Computer Inc)    37 °C
        Storage
            931GB Crucial CT1000MX500SSD1 (SATA (SSD))
            119GB Crucial C300-CTFDDAC128MAG (SATA (SSD))
            465GB Crucial CT500MX500SSD1 (SATA (SSD))
        Optical Drives
            ASUS DRW-24F1ST a
        Audio
            JBL Quantum 400* Game 

Thanks Sir

Fixed file in the Attach