1. Sometimes the first layer is too small and does not have enough space to extrude.That will make first layer extruders empty
jira: STUDIO-13030
Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: I69b99ab74101c772f4c91e955060e403988bb91c
(cherry picked from commit 9699397858c6d52d027e79e91041a9dac7280bba)