74LS189 Output Flickering

When I set all the inputs to low and set write enable to high, all outputs should be high since they are inverted. When I set write enable to low again, all outputs are high, except for one output, O3 (pin 11). This output is not showing any output at all, except for an extremely faint flickering. Why is this happening??

When I set all the inputs to low and set write enable to high, all outputs should be high since they are inverted. When I set write enable to low again, all outputs are high, except for one output, O3 (pin 11). This output is not showing any output at all, except for an extremely faint flickering. Why is this happening??