[ps67]

With the last release 2020-10 I experience a flash (full refresh) each turn of page whatever I settle it on Eink settings. I tried the nightly 2020-10-3, but there is the same behavior.

I don't know if it is only on mine Pocketbook, only on PB633 Color or in all Pocketbook devices (but someone else should have noticed it).

In the file settings.reader.lua the ["full_refresh_count"] = 6 is settled correctly.

Spoiler:

return {
    ["footer"] = {
        ["wifi_status"] = false,
        ["pages_left"] = false,
        ["chapter_time_to_read"] = false,
        ["mem_usage"] = false,
        ["book_chapter"] = false,
        ["item_prefix"] = "icons",
        ["book_time_to_read"] = false,
        ["text_font_size"] = 14,
        ["frontlight"] = false,
        ["book_chapter_max_width_pct"] = 30,
        ["progress_margin_width"] = 18,
        ["book_title"] = false,
        ["text_font_bold"] = false,
        ["battery"] = false,
        ["book_title_max_width_pct"] = 30,
        ["disable_progress_bar"] = true,
        ["reclaim_height"] = false,
        ["progress_bar_min_width_pct"] = 20,
        ["container_bottom_padding"] = 0,
        ["time"] = false,
        ["disabled"] = false,
        ["percentage"] = false,
        ["toc_markers"] = true,
        ["all_at_once"] = true,
        ["toc_markers_width"] = 2,
        ["page_progress"] = false,
        ["container_height"] = 14
    },
    ["language"] = "it_IT",
    ["home_dir"] = "/mnt/ext1/Books",
    ["twelve_hour_clock"] = false,
    ["color_rendering"] = true,
    ["style_tweaks"] = {
        ["footnote-inpage_epub_smaller"] = true,
        ["footnote-inpage_fb2"] = true
    },
    ["filemanagermenu_tab_index"] = 5,
    ["larger_tap_area_to_follow_links"] = true,
    ["cre_font"] = "Bookerly",
    ["show_bottom_menu"] = false,
    ["wifi_was_on"] = true,
    ["text_lang_fallback"] = "en-US",
    ["quickstart_shown_version"] = 202008010000,
    ["copt_font_gamma"] = 42,
    ["dicts_order"] = {},
    ["no_refresh_on_second_chapter_page"] = true,
    ["dicts_disabled"] = {},
    ["copt_font_size"] = 22.3,
    ["device_id"] = "73FD884E428F42BDA94677AAF4BA2299",
    ["autoremove_deleted_items_from_history"] = true,
    ["full_refresh_count"] = 6,
    ["copt_font_hinting"] = 2,
    ["night_full_refresh_count"] = 6,
    ["copt_word_expansion"] = 5,
    ["link_prefer_footnote"] = true,
    ["footnote_link_in_popup"] = true,
    ["copt_render_dpi"] = 300,
    ["statistics"] = {
        ["is_enabled"] = true,
        ["convert_to_db"] = true,
        ["calendar_nb_book_spans"] = 3,
        ["calendar_show_histogram"] = true,
        ["calendar_browse_future_months"] = false,
        ["min_sec"] = 5,
        ["max_sec"] = 120,
        ["calendar_start_day_of_week"] = 2
    },
    ["dev_no_c_blitter"] = true,
    ["lastfile"] = "/mnt/ext1/Books/Moffett, Mark W_/sciame umano, Lo - Mark W. Moffett.epub",
    ["ota_channel"] = "nightly",
    ["coverbrowser_initial_default_setup_done"] = true,
    ["copt_block_rendering_mode"] = 2,
    ["copt_font_kerning"] = 3,
    ["lastdir"] = "/mnt/ext1/Books",
    ["disable_double_tap"] = false,
    ["refresh_on_chapter_boundaries"] = true,
    ["collate"] = "access",
    ["auto_save_settings_interval_minutes"] = 15
}

edit: still no chance for color? Anyway
second edit: install again from zero instead of OTA could help? Unfortunately the answer is no.