Logback stops logging while application is running

Question

I am using springboot 2.2.6.RELEASE and I also have the following jars for log4j (I have an old 3rd party library (Filenet jars) that requires log4j class org.apache.log4j.Priority to be present on classpath on runtime)

I am using log4j-1.2-api compatibility api to allow the application to use use Log4j 2 instead of Log4j 1.2 API since org.apache.log4j.Priority exists in log4j-1.2 which I don't want to use because it has vulnerabilities and I want to transform the code to Log4j 2

<dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-1.2-api</artifactId>
            <version>2.15.0</version>
        </dependency>
        
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.16.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.16.0</version>
        </dependency>
        
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-to-slf4j</artifactId>
            <version>2.16.0</version>
        </dependency>

my logback.xml is as follows :

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="120 seconds">

<!-- 
 reference here : http://logback.qos.ch/manual/layouts.html
 %d : 2006-10-20 14:06:49,812
 %-5level : the level of the logging event should be left justified to a width of five characters
 logger{length} : shorten the logger class name
 -->
<property name="logPattern" value="%d %-5level %logger{35} - %msg%n"/>
<property name="logEncoding" value="UTF-8"/>
<property name="logDirectory" value="C:\\MYAPP_LOGS"/>

<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <charset>${logEncoding}</charset>
      <pattern>${logPattern}</pattern>
    </encoder>
</appender>
  
<appender name="fileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${logDirectory}/myapp.log</file>
    
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">              
        <fileNamePattern>${logDirectory}/myapp.%d{yyyy-MM-dd}.log</fileNamePattern>
        <maxHistory>30</maxHistory>
        <totalSizeCap>3GB</totalSizeCap>       
    </rollingPolicy>
    
    <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
        <maxFileSize>5MB</maxFileSize>
    </triggeringPolicy>
    
    <encoder>
        <charset>${logEncoding}</charset>
        <pattern>${logPattern}</pattern>
    </encoder>
    
</appender>

<logger name="org.springframework.security" level="ERROR"/>
<logger name="org.primefaces" level="ERROR"/>
<logger name="com.ocpsoft" level="ERROR"/>
<logger name="com.myapp" level="DEBUG"/>

<root level="INFO">
    <appender-ref ref="fileAppender"/>
    <appender-ref ref="console" />
</root>

</configuration>

The application runs on tomcat 9.0.34 standalone windows service

ISSUE: sometimes for no obvious reason the application stops writing to log file and I want to find out what causes the issue.