very slow building orthomosaic using network processing (29.7%， 35.6%)

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very slow building orthomosaic using network processing (29.7%， 35.6%)

network condition:
Photos and process files are stored on the server(SSD RAID 5, synology) and shared to all nodes(PC) through smb protocol（windows mapped network drive, z:\）
All nodes are connected through 10G network, copying files speed to/from Z:\  >500MB/s

network processing node bat file:

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C:\"Program Files\Agisoft\Metashape Pro\metashape.exe" --node --host IP  --root Z:\   task detail for build orthomosaic: 

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surface = DEM, blending mode = Mosaic, refine seamlines = 1, ghosting filter = 0, resolution = 0
When build orthomosaic using network processing , I find that when the progress will stuck at 29.7% or 35.6%, at that time, only one node is running the task, and there is no obvious pressure on network, disk, and CPU on that node. larger area, longer processing time were found. For example, processing of 1 square kilometer aerial image, it will be stuck for 1 hour or more time at this step.

This phenomenon was not found when running locally.

Please help, thanks.

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Build Orthomosaic (35.6%)
2023-06-07 22:03:27 BuildOrthomosaic.mergePartitionGraph (1/1): surface = DEM, blending mode = Mosaic, refine seamlines = 1, ghosting filter = 0, resolution = 0
2023-06-07 22:03:28 Refining seamlines...
2023-06-07 22:03:28 Merging topology...
2023-06-07 22:06:43 topology merged: Topology:
2023-06-07 22:06:43 n_vertices: 121611
2023-06-07 22:06:43 n_edges: 199175
2023-06-07 22:06:43 RAM size: 0.0361499 GB
2023-06-07 22:06:43 collapsing short edges..
2023-06-07 22:06:47 graph merged in 199.456 sec
2023-06-07 22:06:47 processing finished in 200.408 sec