Health is shown as 0!

When I was in a Realm server,I had a fall damage.As I fell,the health became to 0.

The video:https://www.bilibili.com/video/BV1aSpZeNEUP/?spm_id_from=333.999.0.0&vd_source=f531fcb2c48c5b1be409bb154f4a86ed

Maybe these information is useful:

CPU:Intel Pentium Gold G5400 @3.70GHZ

Memory:8GB,2400MHZ

Hard disk:WDC WDS240GB2G0A-00JH30

GPU:Intel UHD Graphics 610