diff --git a/CHANGES b/CHANGES
index f216d020a..59ac61b8e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,7 +1,7 @@
 0.8.4: (Future)
-Other fixes:
  - 3DS: Redo video sync to be more precise
  - 3DS: Fix crash with libctru 2.0 when exiting
+ - GBA Video: Invalidate map cache when modifying BGCNT (fixes mgba.io/i/1846)
  - Qt: Add dummy English translation file (fixes mgba.io/i/1469)
  - mGUI: Fix closing down a game if an exit is signalled
  - mVL: Fix injecting accidentally draining non-injection buffer
diff --git a/cinema/gba/bg/ff6-midframe-update/baseline_0000.png b/cinema/gba/bg/ff6-midframe-update/baseline_0000.png
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diff --git a/cinema/gba/bg/ff6-midframe-update/baseline_0001.png b/cinema/gba/bg/ff6-midframe-update/baseline_0001.png
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diff --git a/cinema/gba/bg/ff6-midframe-update/baseline_0015.png b/cinema/gba/bg/ff6-midframe-update/baseline_0015.png
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diff --git a/cinema/gba/bg/ff6-midframe-update/test.mvl b/cinema/gba/bg/ff6-midframe-update/test.mvl
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index 000000000..9bb96c645
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diff --git a/src/gba/renderers/video-software.c b/src/gba/renderers/video-software.c
index 9705d8440..bf5b145c3 100644
--- a/src/gba/renderers/video-software.c
+++ b/src/gba/renderers/video-software.c
@@ -760,6 +760,7 @@ static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer*
 	bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
 	bg->overflow = GBARegisterBGCNTGetOverflow(value);
 	bg->size = GBARegisterBGCNTGetSize(value);
+	bg->yCache = -1;
 }
 
 static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {