[MapProxy] Differerence between cached and not cacheed wms source

[shinkarev.alexander at soft.byndyu.ru]

Hello!

I've got a problem, when i add a clear WMS-source it's all fine, but when i add the same WMS-source but from MapProxy cache, there is a problem, after some zoom lavel no more data without errors. Can you explain what is a problem and what shall i do? Thank you.

There is a piece of my mymapproxy.yaml

layers:
  - name: susu_all
    title: Cached layers
    sources: [SUSU_cache_ALL]
  - name: susu_all_not_cache
    title: Not cached layers
    sources: [SUSU_ALL]

caches:
  SUSU_cache_ALL:
    sources: [SUSU_ALL]
    grids: [test_grid]
sources:
  SUSU_ALL:
    type: wms
    req:
      url: http://gis.susu.ac.ru/wms1?
      layers: F1,F2,F3,F4,F5,F6,F7,F8
      transparent: true
    supported_srs: ['EPSG:28411']
    coverage:
      bbox: [55, 51, 64, 56]
      bbox_srs: 'EPSG:4326'
grids:
  test_grid:
    base: GLOBAL_GEODETIC
    #res: [840, 560, 280, 140, 56, 28, 14, 5.6]
    bbox: [55, 51, 64, 56]
    bbox_srs: 'EPSG:4326'